Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2006 Mazda 6 i, 4D Sedan, AutomaticFACTORY OEM SERVICE PROCEDURE
ECT Sensor Resistance Inspection
- Drain the engine coolant. (See COOLING SYSTEM SERVICE WARNINGS ).
- Remove the ECT sensor (located above the starter).
- Place the ECT sensor in water with a thermometer, and heat the water gradually.
- Measure the resistance between the ECT sensor terminals A and B using an ohmmeter.
- If not as specified, replace the ECT sensor.
- If the ECT sensor is normal, but PID value is out of specification, perform the "Circuit Open/Short Inspection".
Specification
WATER TEMPERATURE RESISTANCE CHART
| Water temperature (°C {°F}) | Resistance (kilohm) |
|---|---|
| 20 {68} | 35.48-39.20 |
| 70 {158} | 5.07-5.60 |
| 80 {176} | 3.65-4.02 |
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.